syzkaller login: [ 38.694580] BUG: Bad rss-counter state mm:000000003c5a9dc6 type:MM_FILEPAGES val:33 [ 38.695764] BUG: Bad rss-counter state mm:000000003c5a9dc6 type:MM_ANONPAGES val:22 [ 38.731765] ================================================================== [ 38.732490] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.733241] Read of size 8 at addr ffff88800dbc6d08 by task sshd/219 [ 38.733861] [ 38.734147] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.734830] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.735611] Call Trace: [ 38.735867] [ 38.736094] dump_stack_lvl+0x91/0xf0 [ 38.736482] print_report+0xcc/0x620 [ 38.736867] ? __virt_addr_valid+0x102/0x340 [ 38.737298] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.737830] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.738287] kasan_report+0xbe/0xf0 [ 38.738576] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.738942] vma_interval_tree_remove+0xc75/0xec0 [ 38.739297] vma_prepare+0xc54/0x11a0 [ 38.739597] __split_vma+0x5af/0x950 [ 38.739944] ? __pfx___split_vma+0x10/0x10 [ 38.740326] ? find_held_lock+0x2c/0x110 [ 38.740699] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.741108] ? lock_is_held_type+0x9f/0x120 [ 38.741490] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.741933] ? mtree_range_walk+0x632/0x900 [ 38.742322] ? mas_walk+0x5c7/0x7c0 [ 38.742661] do_vmi_munmap+0x1f1/0x2b0 [ 38.743006] mmap_region+0x1f9/0x2660 [ 38.743347] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.743708] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.744214] ? __pfx_lock_acquire+0x10/0x10 [ 38.744605] ? __pfx_mmap_region+0x10/0x10 [ 38.744979] ? security_mmap_addr+0x7d/0xa0 [ 38.745356] ? get_unmapped_area+0x1f5/0x3f0 [ 38.745763] do_mmap+0x854/0xf00 [ 38.746075] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.746421] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.746819] ksys_mmap_pgoff+0x3af/0x500 [ 38.747172] do_syscall_64+0x3f/0x90 [ 38.747504] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.747953] RIP: 0033:0x7ff461ca4d82 [ 38.748272] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 38.749794] RSP: 002b:00007ffde477e1c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.750363] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff461ca4d82 [ 38.750895] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff4610de000 [ 38.751409] RBP: 00007ff4610de000 R08: 0000000000000009 R09: 0000000000001000 [ 38.751928] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eb6bfa8d90 [ 38.752443] R13: 00007ffde477e1e0 R14: 00007ffde477e210 R15: 00007ffde477e570 [ 38.752995] [ 38.753172] [ 38.753298] Allocated by task 212: [ 38.753556] kasan_save_stack+0x22/0x50 [ 38.753870] kasan_set_track+0x25/0x30 [ 38.754161] __kasan_slab_alloc+0x59/0x70 [ 38.754469] kmem_cache_alloc+0x16b/0x370 [ 38.754786] vm_area_dup+0x20/0x160 [ 38.755059] __split_vma+0x170/0x950 [ 38.755341] split_vma+0xc6/0x110 [ 38.755605] mprotect_fixup+0x8d2/0xb30 [ 38.755905] do_mprotect_pkey+0x87e/0xd40 [ 38.756210] __x64_sys_mprotect+0x78/0xc0 [ 38.756522] do_syscall_64+0x3f/0x90 [ 38.756804] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.757181] [ 38.757308] Freed by task 212: [ 38.757546] kasan_save_stack+0x22/0x50 [ 38.757870] kasan_set_track+0x25/0x30 [ 38.758175] kasan_save_free_info+0x2b/0x50 [ 38.758500] __kasan_slab_free+0x10a/0x190 [ 38.758832] kmem_cache_free+0x10d/0x4d0 [ 38.759141] rcu_core+0x8c8/0x2860 [ 38.759418] __do_softirq+0x1b7/0x7d4 [ 38.759712] [ 38.759842] Last potentially related work creation: [ 38.760197] kasan_save_stack+0x22/0x50 [ 38.760511] __kasan_record_aux_stack+0x8e/0xa0 [ 38.760861] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.761260] remove_vma+0x139/0x170 [ 38.761541] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.761887] do_vmi_munmap+0x1f1/0x2b0 [ 38.762189] __vm_munmap+0x138/0x3a0 [ 38.762478] __x64_sys_munmap+0x59/0x80 [ 38.762780] do_syscall_64+0x3f/0x90 [ 38.763068] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.763466] [ 38.763600] Second to last potentially related work creation: [ 38.764027] kasan_save_stack+0x22/0x50 [ 38.764333] __kasan_record_aux_stack+0x8e/0xa0 [ 38.764705] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.765091] remove_vma+0x139/0x170 [ 38.765362] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.765723] do_vmi_munmap+0x1f1/0x2b0 [ 38.766012] __vm_munmap+0x138/0x3a0 [ 38.766288] elf_map+0x26f/0x310 [ 38.766551] load_elf_binary+0xd82/0x5030 [ 38.766870] bprm_execve+0x803/0x1940 [ 38.767147] do_execveat_common+0x734/0x8e0 [ 38.767452] __x64_sys_execve+0x93/0xc0 [ 38.767752] do_syscall_64+0x3f/0x90 [ 38.768033] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.768416] [ 38.768547] The buggy address belongs to the object at ffff88800dbc6cb0 [ 38.768547] which belongs to the cache vm_area_struct of size 168 [ 38.769557] The buggy address is located 88 bytes inside of [ 38.769557] freed 168-byte region [ffff88800dbc6cb0, ffff88800dbc6d58) [ 38.770419] [ 38.770545] The buggy address belongs to the physical page: [ 38.770945] page:000000008bf0fb6b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdbc6 [ 38.771607] memcg:ffff8880144a1501 [ 38.771865] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.772288] page_type: 0xffffffff() [ 38.772555] raw: 0100000000000200 ffff8880087a0c80 ffffea0000325880 dead000000000007 [ 38.773120] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880144a1501 [ 38.773668] page dumped because: kasan: bad access detected [ 38.774059] [ 38.774186] Memory state around the buggy address: [ 38.774533] ffff88800dbc6c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.775047] ffff88800dbc6c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.775558] >ffff88800dbc6d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.776075] ^ [ 38.776334] ffff88800dbc6d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.776841] ffff88800dbc6e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 38.777349] ================================================================== [ 38.777948] Disabling lock debugging due to kernel taint [ 40.644580] BUG: Bad rss-counter state mm:0000000026c76be1 type:MM_FILEPAGES val:33 [ 40.645900] BUG: Bad rss-counter state mm:0000000026c76be1 type:MM_ANONPAGES val:22 [ 41.110575] BUG: Bad rss-counter state mm:00000000f9900d4c type:MM_FILEPAGES val:33 [ 41.111887] BUG: Bad rss-counter state mm:00000000f9900d4c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13516' (ECDSA) to the list of known hosts. 2023/06/21 06:56:09 fuzzer started 2023/06/21 06:56:09 dialing manager at localhost:36067 2023/06/21 06:56:09 checking machine... 2023/06/21 06:56:09 checking revisions... [ 41.825823] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:56:09 testing simple program... [ 41.874096] cgroup: Unknown subsys name 'net' [ 41.998772] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:56:09 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fffba347c58 CR3=0000000005482000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=00007f15a094d5100000562681b09790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888015d60001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888015d5fd01 RSI=ffff888015d5fdf0 RDI=ffff888015d5f9b8 RBP=ffff888015d5fdf0 RSP=ffff888015d5f910 R8 =ffffffff8614ed12 R9 =ffff888015d5f9e8 R10=0000000000038001 R11=00000000000247f6 R12=0000000000000008 R13=ffff888015d58000 R14=ffff888015d5fdf8 R15=ffff888015d5f9a8 RIP=ffffffff811304ce RFL=00000282 [--S----] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8e3bf5e900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f8e3c515618 CR3=000000000c7b6000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000